pulsesink: Temporarily disable stream status posting
pulsesink: Temporarily disable stream status posting

We need a mechanism in PulseAudio to allow running code outside the
mainloop lock. Then we'd be able to post to the bus (taking the
GST_OBJECT_LOCK), without worrying about locking order with the mainloop
lock, which is the current cause of deadlocks while trying to post the
stream status messages.

https://bugzilla.gnome.org/show_bug.cgi?id=736071

surround-io/gst-plugins-good,surround-io/gst-plugins-good,surround-io/gst-plugins-good,jpakkane/gstreamer-plugins-good,wkatsak/gst-plugins-good,ndufresne/gst-plugins-good,ndufresne/gst-plugins-good,ndufresne/gst-plugins-good,ndufresne/gst-plugins-good,vatavuserban/gst-plugins-good,jpakkane/gstreamer-plugins-good,jpakkane/gstreamer-plugins-good,surround-io/gst-plugins-good,wkatsak/gst-plugins-good,vatavuserban/gst-plugins-good,wkatsak/gst-plugins-good,wkatsak/gst-plugins-good,jpakkane/gstreamer-plugins-good,vatavuserban/gst-plugins-good,vatavuserban/gst-plugins-good